1 /*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "adapter/ohos/entrance/pa_engine/engine/common/js_backend_engine_loader.h"
17
18 #include <dlfcn.h>
19
20 namespace OHOS::Ace {
21 namespace {
22
23 constexpr char BACKEND_ENGINE_ENTRY[] = "OHOS_ACE_GetJsBackendEngineLoader";
24
25 using DynamicEntry = void* (*)();
26 class DummyJsBackendEngineLoader final : public JsBackendEngineLoader, public Singleton<DummyJsBackendEngineLoader> {
27 DECLARE_SINGLETON(DummyJsBackendEngineLoader);
28
29 public:
CreateJsBackendEngine(int32_t instanceId) const30 RefPtr<JsBackendEngine> CreateJsBackendEngine(int32_t instanceId) const override
31 {
32 return nullptr;
33 }
34 };
35
36 DummyJsBackendEngineLoader::DummyJsBackendEngineLoader() = default;
37 DummyJsBackendEngineLoader::~DummyJsBackendEngineLoader() = default;
38
GetJsBackendEngineLoader(const char * sharedLibrary)39 JsBackendEngineLoader& GetJsBackendEngineLoader(const char* sharedLibrary)
40 {
41 CHECK_NULL_RETURN(sharedLibrary, DummyJsBackendEngineLoader::GetInstance());
42 void* handle = dlopen(sharedLibrary, RTLD_LAZY);
43 if (handle == nullptr) {
44 LOGE("Failed to open shared library %{public}s, reason: %{public}sn", sharedLibrary, dlerror());
45 return DummyJsBackendEngineLoader::GetInstance();
46 }
47
48 auto entry = reinterpret_cast<DynamicEntry>(dlsym(handle, BACKEND_ENGINE_ENTRY));
49 if (entry == nullptr) {
50 dlclose(handle);
51 LOGE("Failed to get symbol %{public}s in %{public}s", BACKEND_ENGINE_ENTRY, sharedLibrary);
52 return DummyJsBackendEngineLoader::GetInstance();
53 }
54
55 auto loader = reinterpret_cast<JsBackendEngineLoader*>(entry());
56 if (loader == nullptr) {
57 dlclose(handle);
58 LOGE("Failed to get js engine loader in %{public}s", sharedLibrary);
59 return DummyJsBackendEngineLoader::GetInstance();
60 }
61
62 return *loader;
63 }
64
65 } // namespace
66
Get(const char * sharedLibrary)67 JsBackendEngineLoader& JsBackendEngineLoader::Get(const char* sharedLibrary)
68 {
69 static JsBackendEngineLoader& instance = GetJsBackendEngineLoader(sharedLibrary);
70 return instance;
71 }
72
73 } // namespace OHOS::Ace
74